如何从 JSON.stringify 中删除转义序列以使其可读？

Question

When I call JSON.stringify() on a complex object in JavaScript, it produces a string with lots of escape sequences (\\", \\\\", etc.).

How can I make it create a human-readable JSON string instead? Ie, one that you can copy/paste into one of the many JSON validators on the web?

To clarify, my #1 concern is removing the escape sequences.

Answer 1

You can use the replacer. The second parameter provided by JSON.stringify.Replacer could be a function or array.

In your case we can create a function which replaces all the special characters with a blank space.The below example replaces the whitespaces and underscores.

function replacer(key, value) {
  return value.replace(/[^\w\s]/gi, '');
}

var foo = {"a":"1","b":2};
var jsonString = JSON.stringify(foo, replacer);

If you simply want to replace the one special character, use:

JSON.stringify({ a: 1, b: 2 }, null, '\t');

For more information on replacer, check the MDN page JSON.stringify() .

Answer 2

You can use formatting on JSON.stringify .

'\\t' represent a tab character

JSON.stringify({ uno: 1, dos: 2 }, null, '\t');
// returns the string:
// '{
//     "uno": 1,
//     "dos": 2
// }'

Answer 3

You can use

JSON.stringify() and replaceAll()

Source: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replaceAll

  
 
  
  
  
 
   
 
    
const foo = {
    A: 'This is my \\',
    B: 'This \\ is his \\'
};

let jsonString = JSON.stringify(foo, null, 2);

document.write(jsonString);

jsonString = jsonString.replaceAll('\\', '');

document.write('<pre>' + jsonString + '</pre>');
 
   
 
  

Answer 4

JSON.stringify(value[, replacer[, space]])

Space: A String or Number object that's used to insert white space into the output JSON string for readability purposes.

Replacer: A function that alters the behavior of the stringification process, or an array of String and Number objects that serve as a whitelist for selecting the properties of the value object to be included in the JSON string. If this value is null or not provided, all properties of the object are included in the resulting JSON string.

So you can do

 var x = {"name":"void", "type":"O'\\"Rielly"}; document.write(JSON.stringify(x, null, ' '));

Answer 5

I would use JSON.stringify() ,

The JSON.stringify() method converts a JavaScript value to a JSON string, optionally replacing values if a replacer function is specified, or optionally including only the specified properties if a replacer array is specified.

with four spaces and an appropriate display environment with <pre>...</pre> .

The result is good, readable, and copyable for other use.

 var object = { name: 'void', type1: "O'\\"This", type2: 'O\\'That', a: [1, 2, 3] }; document.write('<pre>' + JSON.stringify(object, 0, 4) + '</pre>');